From: Gaggery Tsai <gaggery.tsai@intel.com>
Date: Thu, 10 Apr 2026 10:00:00 -0700
Subject: [PATCH] drm/i915: send TRANS_PUSH Frame Change for Panel Replay cursor updates

Panel Replay Selective Update requires a software-triggered Frame
Change event via TRANS_PUSH to send dirty regions to the panel.
Cursor updates (legacy_cursor_update) skip TRANS_PUSH_SEND, so the
panel never receives cursor position changes under Panel Replay SU.

Fix by sending TRANS_PUSH with LNL_TRANS_PUSH_PSR_PR_EN for cursor
updates when Panel Replay is active.

Signed-off-by: Gaggery Tsai <gaggery.tsai@intel.com>
---
diff --git a/drivers/gpu/drm/i915/display/intel_vrr_regs.h b/drivers/gpu/drm/i915/display/intel_vrr_regs.h
--- a/drivers/gpu/drm/i915/display/intel_vrr_regs.h
+++ b/drivers/gpu/drm/i915/display/intel_vrr_regs.h
@@ -97,6 +97,7 @@
 #define TRANS_PUSH(display, trans)		_MMIO_TRANS2((display), (trans), _TRANS_PUSH_A)
 #define   TRANS_PUSH_EN				REG_BIT(31)
 #define   TRANS_PUSH_SEND			REG_BIT(30)
+#define   LNL_TRANS_PUSH_PSR_PR_EN		REG_BIT(16)
 
 #define _TRANS_VRR_VSYNC_A			0x60078
 #define TRANS_VRR_VSYNC(display, trans)		_MMIO_TRANS2((display), (trans), _TRANS_VRR_VSYNC_A)
diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c b/drivers/gpu/drm/i915/display/intel_crtc.c
--- a/drivers/gpu/drm/i915/display/intel_crtc.c
+++ b/drivers/gpu/drm/i915/display/intel_crtc.c
@@ -732,7 +732,8 @@
 	 * which would cause the next frame to terminate already at vmin
 	 * vblank start instead of vmax vblank start.
 	 */
-	if (!state->base.legacy_cursor_update)
+	if (!state->base.legacy_cursor_update ||
+	    new_crtc_state->has_panel_replay)
 		intel_vrr_send_push(NULL, new_crtc_state);
 
 	local_irq_enable();
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -597,7 +597,7 @@
 	struct intel_display *display = to_intel_display(crtc_state);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 
-	if (!crtc_state->vrr.enable)
+	if (!crtc_state->vrr.enable && !crtc_state->has_panel_replay)
 		return;
 
 	if (dsb)
@@ -605,7 +605,8 @@
 
 	intel_de_write_dsb(display, dsb,
			   TRANS_PUSH(display, cpu_transcoder),
-			   TRANS_PUSH_EN | TRANS_PUSH_SEND);
+			   TRANS_PUSH_EN | TRANS_PUSH_SEND |
+			   (crtc_state->has_panel_replay ? LNL_TRANS_PUSH_PSR_PR_EN : 0));
 
 	if (dsb)
 		intel_dsb_nonpost_end(dsb);